|Statement||Robert Lavallée and Gilles Bonneau.|
|Series||Information leaflet -- LFC 28, Information leaflet (Laurentian Forestry Centre) -- LFC 28.|
|Contributions||Bonneau, Gilles., Laurentian Forestry Centre.|
|The Physical Object|
|Pagination||11 p. :|
|Number of Pages||11|
The anatomy of the resin canal system was observed on lateral branches of four host species of the white pine weevil (Pissodes strobi Peck) in relation to weevil host species studied were Norway spruce (Picea abies (L.) Karst.), white spruce (Picea glauca (Moench) Voss), red spruce (Picea rubens Sarg.), and white pine (Pinus strobus L.).Cited by: The goals of the white pine weevil workshop, held from January in Richmond (B.C.), were to consolidate current scientific knowledge concerning this pest, and to map out a strategy for. The southern half of the State of Maine contains large forest tracts in which white pine is the predominating tree, but the majority of these have become crooked, scrubby or bushy, owing in part to the action of pine blister rust, and more particularly to the activities of the white pine weevil [Pissodes strobi], an insect native to the : M. W. Blackman. North America (Entomol. Soc. Am.) is the pine root collar weevil, but it has been referred to in the literature as Scots pine weevil, pine crown weevil, and pine root weevil. Its French name, used in Quebec, is charancon du collet du pin. Figure 1 shows its four live stages-egg, larva, pupa, and adult. F, F, F, F 2.
The greater part of the information contained in this account of the biology and control of Pissodes strobi, Peck (white pine weevil) in the north-eastern United States and the Canadian Provinces of Nova Scotia and New Brunswick is similar to that already noticed [R.A.E., A, xviii, , etc.]. With regard to the effect of soil on infestation [xv, ], the author now states that pines on medium. Unpublished MS thesis, Cornell University, Ithaca, NY Graham, S. A. () Biology and control of the white-pine weevil Pissodes strobi Peck. Bull. Come,el Univ. Agr. Exp. Stn. , Greathead, D. J. () Progress in the biological control of Lantana camara in East Africa and discussion of problems raised by the unexpected reaction of. Lucas & Riudavets () studied the combination of mechanical and biological control methods in the laboratory on S. oryzae in rice and found the sex ratio of A. calandrae to be skewed towards. If you need to control white pine weevil, your best opportunity is early in spring. Insecticide should be applied to the terminal leader once it begins to warm up, somewhere around 25 to 65 growing degree-days base This is happening now around Lansing, Michigan, and will probably not happen until the end of April around Cadillac, Michigan.
Control Options Biological. Use of parasites is not practical because larvae are below the soil and usually protected by pine pitch. Mechanical. To increase soil temperature and therefore decrease existing populations and lessen the risk of infestations, butt-prune trees a . White Pine Weevil Control Tips Attacks white pines, spruces More common in pure plantings Adults emerge in early spring when T > 50 F (as early as March in PA), Treat in early spring when adults emerge with borer pesticide Mechanically remove Shepard’s Crooks before August 1. The white pine weevil (figure 1) - Pissodes strobi (Peck) (Coleoptera: Curculionidae) - is a native insect attacking eastern white pine (Pinus strobus L.).The latest cytogenetic and breeding studies indicate that two other North American pine weevil species - the Sitka spruce weevil and the Engelmann spruce weevil-also should be classified as Pissodes strobi. White pine weevil larval feeding damage is now evident throughout Ohio. Look for brown, wilted main shoots (terminal leaders) with the tips sometimes curved into a "shepherd’s crook." There is one generation per year and localized populations may be reduced by removing and destroying the infested terminals before new adult weevils emerge.